Heat control



July 20, 1943;

2., oLsoN- HEAT coflTRoL Filed 001;. 2:5, 1941 3 Sheets-Shout 1 7' E'I ner 0150a INVENTOR ATTORNEY July 20, 1943. E. OLSON HEAT common Filed Oct. 23, 1941 3 Sheets-Sheet 2 Elmer 0/7012 INVENTOR ATTORNEY July .20, 1943. E. OLSON 2,324,592

' HEAT CONTROL Filed 001;. 25, 1941 :s Sheets- Sheet 3 Elmer 0X50):

INVENTOR.

ATTORNEY starting oberation and the idling'speetl.

" restricted opening furnishes-exhaust gases-gto the cooling efiect' of-the air frem the'engine fan I ther'jinlet eating with the pa ssage lll which leads;.to the e carburetor'outlet ifi-vcommunicateswiththe otiier the Inner cup which is connectedthe er5 thefposition shown; the'cho ke Va Y maticallyeontrolledfor theleverl' be moved 1 T2 isheld closedfpesitively; or thelever-"moan "'projetion T l end -holdsthe bhokewailp e"Reopen.

r I I I I 7' 2,324,592 determined by the roller 22 which engages with the upper leg of the thermostatzll. I

Obviously, if the thermostat is hot; the lever I ftends to ope 21 can rotate-further in a eloqkwisedirection eonnectsth before the roller 22 engages withtheupuper 'arin *element 15 of thethermostat ZBQ in-Which case the rod 35 7 will notmove Very far and hence the choke'va l e -f f (Fig; 6) connected to the rod 35 is not mox e very much. For the same reason, in cold weather 7 the lever 27 rotates a sma1ler;:Idistance ,thg does in hotfweather in a, clockwise direotien fore the roller 22 engagesthe thermostat 2B,} in I which case the rod. 35 moves' furtherthan it did] before and'hence the choke valve'is moveda co n siderable distance, and hence the engine is given aricher mixture for starting, I 'i The rate of heatingrup of th' thermostat ;20 is controlled by the' dead'fagir spacej betweenthe' pans l8 and l9,v 'an d determines the pos'ition of the lever 2Twhich in its turn determines the position of the chokervalve' isee Fig. 6) and h'encethedegree of richness of the mixture; during the The lower half of the carburetor is 'shownin 'Fig. L and isnumbered '32. Awthrottle arm is shown at 33 together with the accelerating pump connection 34 (see Fig; 6;): I In Fig, 2 the mixture inlet passages'afl and 3| I V are ShOWIlin cross section and in Fig. 3 the mixture outlets 36 and Hand alsel'E-Sand Hare shown whieh convey the mixture to the inlet'pa'ssage of the engine. The relative'heating effector" theexhaust-gas on; the carburetor and on. the thermostat is regulated by the restricticn-36 (Fig. 3). Some of theexhaust gasesiflowingthrough 1 38 pass through the passage 'iiito the outlet llkf but'some of; the exhaus t 'gjases' ;takea-longer r route, namely, theyytravel'along' the passage-39 1 to'the heating chamber 46,;- which for-ms a heat-, ing jacket fat-themi-xture outlets from the car buretor located in the inlet manifoldlsee Fig. 5) F The openirig 38 controls theavailable amount; i ofexhaust heat both foriheatingthe thermostat;

and for the heating chamber 49. 'Tne'smallerifi I I I I is, the less exhaust flows to the mixturefheeting passages "38; chamber 49 and'theinore is available for the pliedto th'emixture ut thermostat. t I f -fl totlfe'le'ft On the forward endof the manifolclia'n-unam-1:4

the passage w whichdischarges through the uri- I I I restricted opening 4'4;- The reasonfor-this is that theat fromihe e tends to cool the mixturein the passages 46, 41, V

4'8-and50 more'than inthe -passagesf29, 3 1, 69

and 5L; iv i 3 I: i 2- The carburetor has two outletsqone communi passage 36 which-in ite turn, dischargesmixture I through theip'orts 31,41, 48 and l9s; The other cup" {8- after-ape d, I I In distance between the two; cu

horizontal p ssa e 3,! Which-enthuses t rou h "ports 29,.45,.50 and 5h: r I IniFig; 6, the shaitfiS nected to the elementtikw hich the shaft carryingthe fchoke Val jeetion "H extends ,Iroin: the ele located between thejew's' 79 .a .7 T i 15 mfi l y' counter-clockwise, iii-which case 'tlie 'eheke valve rotate clockwise-end the lip -19 gengages with the 

